Federal Reserve data showing UBS AG and Barclays Plc ranked among the top users of $3.3 trillion from emergency programs is stoking debate on whether U.S. regulators bear responsibility for aiding other nations’ banks.

A d v e r t i s e m e n t

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UBS was the biggest borrower under the Commercial Paper Funding Facility, with $74.5 billion overall, more than twice as much as Citigroup Inc., the top U.S. bank recipient, according to the data released yesterday. London-based Barclays Plc took the biggest single amount under another program that made overnight loans, when it got $47.9 billion on Sept. 18, 2008.

“We’re talking about huge sums of money going to bail out large foreign banks,” said Senator Bernard Sanders, the Vermont independent who wrote the provision in the Dodd-Frank Act that required the Fed disclosures. “Has the Federal Reserve become the central bank of the world? I think that is a question that needs to be examined.”

The first detailed accounting of U.S. efforts to spare European banks may add to scrutiny of the central bank, already at its most intense in three decades. The Fed, which released data on 21,000 transactions, said in a statement that its 11 emergency programs helped stabilize markets and support economic recovery. The Fed said there have been no credit losses on rescue programs that have been closed.